Process of producing insecticidal gas.



UNITED STATES PATENT onron P30015501 PRODUCING INBECTIGIDAL GAS No. 905,609. Specification of Letters Patent. Patented Dec. 1, 1908. Application filed October 9, 1906. Serial No. 338,092.

To all whom it may concern: sufficient heat to cause the evolution of an Be it knownthat I, HENRY V. WALKER, a insecticidal gas. V citizen of the United States, residing at When the selected materials are phenol or Brooklyn, in the city of New York, in the naphthol, quicklime and sulfate of alumina 5 county of New York and State of New York, they may be mixed in the following quantihave invented certain new and useful Imties: phenol or naphthol, four ounces; sulfate provements in Processes of Producing Inof alumina two ounces; and lime one and. secticidal Gas, of which the following is a one-half pounds. To this, at the time of use, Y specification. may be added, say ten ounces of water.

10 My invention relates to the production of The gas thus evolved is destructive of all as for insecticidal and similar purposes and mosquitoes, flies and other insects within the 1ts novelty consists in the several successive range of its influence and will be foundfully' steps of the process employed. effective in killing all insects in an ordinary he principal purpose of the invention is sized room, say one containlng about 1,500

I?) by a simple and ractlcal method to'produce cubic feet.

a gas which wi effectively destroy insects, It will readily be understood by those such as mosquitoes and flies which serve as skilled in the art that my process is applivehicles for the transmission of disease. In cable through a somewhat wide range of pursuance of this object a gas is evolved equivalents, intended to be included within 20 fromasuitable monohydroxyl derivative of the scopes of the subjoined claims. Any

an aromatic hydrocarbon, possessing insectlotherwise suitable reagent capable of concidal properties when in a state of vapor, by bining with a second reagent to produce the mixing therewith a material, such as quicknecessary de ree of heat may be employed lime, which chemicallv combines with a secin place of t e lime and water. There are 25 0nd material, such as water, with the evolulikewise a number of substances which will 30 biningwith the quicklime. In such cases 1 'tion of heat sufficient to volatilize said monobehave like the phenol and na hthol with hydroxyl derivative. The monohydroxyl more or less simllar results an efficiency. derivatives preferred are phenol and naph- Protectin reagents other than the sugthol, which themselves are capable of comested su fate of alumina may, by analo y,

he identified and employed by the skil ed mix wlth the lime and phenol or naphthol, a chemist. 'I have, however, described the piotecting reagent which has a greater afpreferred form of my invention and the one ity for the lime when in solution than the which I now believe is best in carrying it phenol and naphthol'. A good exam le -of out, but without intending thereby to re- 35 such an agent is sulfate of alumina. Vhlle strict myself thereto.

the mixture is waiting to be used, the hme Having thus described my invention what and sulfate of alumina re-act slightly; if at I claim as new, is 2- all, but at the same time the lime is prevented 1. The process of producing an insectifrom reacting with thephenol or naphthol. cidal as which consists in mixing with a in When, however, water is added, the heat of suitab e monohydroxyl derivative of an aro- .the combination volatilizes the phenol or matic hydrocarbon, a protecting material naphthol and produces the desired insectiand a reagent ca able of developing heat cidal gas. sufficient to volat1 ize said derivative when" i In carrying out the preferred method a, combined with a second reagent and adding 1 45 suitable quantity of the selected monohysufficient quantity of the second reagent to droxyl derivative of an aromatic hydrocareffect the esired combination,

bon is mixed with suitable quantities of the 2. The process of producing an insectiselected protecting reagent and substance cidal as which consists in mixing a suitable which-when combined with a second matemono ydroxyl derivative of an "aromatic 1 5 rialdevelops heat for the volatilization of the "hydrocarbon, possessing insecticidal pro ersaid derivative. This mixture, without the ties when in a state of vapor, with quic me second material, referred to, is inclosed in and a suitablereagent having when in solua suitable container until it is to be used. tion a greater affinity for the lime than the When this time arrives, I add to the mixture first named material, and adding a sufficient 11 asufficientquantity of the-second material \quantity of water to combine chemically which Wlll reactupon the line and develop with the lime. 1

- cidal mono ydroxyl derivative of an aromatic hydrocarbon containin from six to ten carbon' atoms, inclusive, anc i afiinity than the said -bon atoms and possessing insecticidal properties when 1 a state of vapor, with a reagent capable of combining with a second reagent.

to produce an evolution of heat sufiicient to volatilize said derivative, and with a protective reagent having a greater affinity for the first named reagent than said derivative,

and adding said second reagent.

4. The process of producing an insecticidal gas which consists in mixing a suitable monohydroxyl derivative of an aromatic hydrocarbon containing more than five carbon atoms and possessing insecticidal properties when in a state of'vapor, with quicklime and a reagenthavin a greater afiinity for the lime than said derivative, and adding sufiicient water to combine with the lime.

5. The process ofproducing an insectias which consists in mixing a suitable possessing insecticidal propertles when in a state "of. vaporrwith quicklime and and adding sufficient the lime.

6. The rocess of producing,--an insecticidal as w hich consists in mixlng a suitable mono ydroxyl derivative of an aromatic hydrocarbon containing from six to ten carbon atoms, inclusive,- and possessing insecticidal water to combine with a reagent having a greater derivative for the lime,

properties when in a'state of vapor, with a material which when united with a suitable reagent is capable of volatilizingsaid derivative, and with a protective reagent having a greater afiinity for said material than said derivative, and agent. g

7. The process of producing an insecticidal gas which consists in mixing a suitable monohydroxyl derivative of an aromatic hydrocarbon possessing insecticidal properties when in a state of va or, with quicklime, a

adding the first named re- .protecting reagent an -'water.

he process of producing an insecticidal gas which consists in mixing a suitable monohydroxyl derivative of an aromatic hydrocarbon, possessing insecticidal properties when in a state of vapor, with quicklime sulfate of alumina and water.

9. The rocess of producing an insecticidal gas w 'ch consists in mixing with naphthol, a suitable protecting reagent, quicklime and a material ca able of combining with the quicklime wit the evolution of heat suflicient to volatilize the naphthol.

10. The process of producing an insecticidal gas which consists-in mixing with naphthol, sulfate of alumina, quicklime and water.

Intestimony whereof I aflix my signature in presence of two witnesses.

.HENRY VQWALKERI.

Witnesses HERMAN MEYER, ALAN MODONNELL 

